Ritsuko speaks with a smile. (In order to hide her true feelings.)
RITSUKO:“She’s a very good girl. She’s just a little clumsy, just like your dad.”
She plays with her bangs with her fingers and looks away.
Reichu: Now, ordinarily I wouldn't think of Ritsuko as being especially attractive (by my own pecuiiar standards of feminine beauty), but, I must admit, I always found her rather pretty in this particular scene. Being dressed down and not wearing that awful lipstick can make a big difference. Now, if only she left her hair in its natural color, too!